XRT73L02M Datasheet, PDF (33/46 Pages) Exar Corporation – TWO CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT

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REV. 1.0.0
TWO CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT
FIGURE 21. JITTER TOLERANCE MEASUREMENTS
XRT73L02M
Pattern
Data
GenPeartatetornr
Generator
Modulation
Freq.
FREQ
SynthFeRsEizQer
Synthesizer
DUT
XRT73DLU0T2M
XRT73L02M
Clock
Error
DetEecrrtoorr
Detector
Input jitter tolerance requirements are specified in terms of compliance with jitter mask which is represented as
a combination of points.Each point corresponds to a minimum amplitude of sinusoidal jitter at a given jitter fre-
quency.
6.0.1.1 DS3/STS-1 Jitter Tolerance Requirements:
Bellcore GR-499 CORE, Issue 1, December 1995 specifies the minimum requirement of jitter tolerance for Cat-
egory I and Category II. The jitter tolerance requirement for Category II is the most stringent. Figure 22 shows
the jitter tolerance curve as per GR-499 specification.
FIGURE 22. INPUT JITTER TOLERANCE FOR DS3/STS-1
64
41
15
10
5
1.5
0.3
0.15
0.1
0.01
GR-253 STS-1
GR-499 Cat II
GR-499 Cat I
XRT73L02M
0.03
0.3
2
JITTER FREQUENCY (kHz)
20
100
31